Bearing puller



Patented Nov. 11, 1941 UNITED STATES PATENT OFFICE "BEARING FULLER James Wilhurn Marcellus, Morewood, Ontario,

Canada 7 Application January 27, 19.41,:Serial.N0..'376,24 5

2 Claims. (01:29-85) My invention relates to a device for removing bearings, pulleys, bushings and the like articles from shafts, commonlyknown as a puller.

In a device of this kind, there are essentially two relatively movable parts, namely, a screw, and a member usually .in the form of a sleeve; the member or sleeve is adapted to surround the shaft and engage one face of the bearing, pulley, bushing or article to be removed from the shaft, while the screw is adapted to be moved axially of the sleeve to' engage the adjacent end of the shaft, with the result thatrthe article is moved on the shaft to the extent that the screw is moved relatively to thesleeve.

The present invention is concerned with the type of puller whichuses a sleeve as a means to directly engage the article to be'removed from the shaft, or as a means to :removably receive a separate article-engaging means. In the latter case, an assortment of article-engaging means adapted for various sizes of shafts may be provided as part of the device complete, to be used as necessity may require.

Figure 4 isa plan or face view of a part of the puller;

Figure 5 is a view similar to Figure 3 of the device assembled as a unit when not in use, parts beingshown in elevation; I Figure 6 is a side elevation, partly in section, of an insert or extension which may be used refined, the insert being shown on a reduced scale.

A specific object of this invention is to provide a puller wherein the sleeveis made of two vcomplementary parts or segments hinged together to permit of the sleeve being open .for application in operative position around the shaft, and to close around the shaft in operative position. Such a sleeve has been found in practice to be very satisfactory, convenient and efficient. It also permits of the easy and convenient application of the particular size of article engaging means selected.

Another specific object of thisinvention is to provide simple and efficient means of releasably locking the two parts closed one against the other in sleeve form and in operative position around the shaft.

Still another specific object of this invention is to so design the puller that its component parts may be assembled into a unit when not in use to permit of its convenient and safe carrying and storing.

And, generally, the objects of this invention are to improve on known pullers.

In the drawing, wherein like numerals of reference indicate corresponding parts in the various figures,

Figure 1 is a side elevation of a puller made in accordance with this invention;

Figure 2 is a fragmentary, top plan view of Figure 1;

Figure 3 is a section on line 3-3 in Figure 2;

Referringnow by numerals to the drawing, S designates a shaft, and B, a typical bearing (wheel or bushing) .or article to be removed from the shaft by the puller.

1'0 is a sleeve, .consisting of two complementary semi-circular parts or segments H and I2, connected together as by suitable hinges [3. The parts are eachcprovided with at least one longitudinallydisposed slot l4,being-in part defined by a, member or bar I15. As shown, this bar is of gradually increasing width from rear to front so as to present an edge l6 'lyingat'an angle to the'edge of the segment which is remote from the hinge'edge;

I1 is a device adapted to releasably lock the two parts or segments H and I2 closed one against the other in their operative or sleeve position around the shaft. As shown, the device may comprise two substantially U-shaped clamps [8 adapted to be applied to the members [5 of the segments, respectively, when the segments are closed, or substantially closed one-"against the other. The depending legs [9 of the clamps will thus engage and ride :on the inclined or cam faces or edges I6 of the members, when pushed toward the front end of the segments, to thus wedge or-bring thesegments into closed relationship or position and releasablylock the same in such position. When two such clamps are used, one is pivotally secured to one end of a strap 20, while the other clamp is pivotally and 'slidably mounted-on-the strap. ,Conveniently,the clamp may be mounted on the end of a pin (not shown) to the upper end of which is secured a knob 22. A slot 23 in one end of the strap will allow the slidable clamp to be adjustable longitudinally relatively to the other clamp.

Each of the segments II and I2 of the sleeve I0 is provided at one end (the forward end) with a peripheral wall forming a shoulder 24 directed inwardly of the segment, the shoulders of bothv segments, respectively, being adapted to provide a support or bearing surface for a removable member 26 formed to receive the shaft S and engage one face of the bearing B. This member 26 may be made as shown in Figure 4, with a slot 28 terminating in a semi-circular edge 29 to against axial movement, in the sleeve.

thus permit of the member being easily applied to or removed from the shaft. In practice, a plurality or assortment of such members, all of a same diameter but of various widths of slots, may be supplied with a sleeve of a certain inside diameter, so that a puller having a sleeve of a certain diameter will be capable of use with shafts whose diameters are within a certain range. conceivably, the puller will be capable of removing bearings or the like of certain diameters without the use of the disc or member 26, as for instance, when the diameter of the bearing is greater than the diameter of the sleeve as measured between the shoulders 24 of the two segments, respectively, when closed one against the other.

30 is a nut adapted to fit loosely within the sleeve I 0, the nut resting or bearing against the wall or shoulder 3| provided on therear end of each of the segments. Projecting from opposite sides of the nut are lugs 32 formed to engage in notches 33 provided in the opposite edges of one of the two segments, that is, the segment ll, adjacent the shoulders 3|, to prevent the nut from rotating with the sleeve as well as to releasably 'lockthenut inoperative position,

Preferably, as shown, the nut includes a flat face 34 which bears against the shoulders-3| when the nut is in operative position so that substantially no strain is imposed upon the lugs 32 of the nut.

Threaded in the nut is a screw 36 on the rear end of which is an operating handle 31. The screw is adapted at one end to engage the adjacent end of the shaft S. Preferably as shown, a bracket or extension 39 is provided to threadingly receive and support the screw at a point remote from the nut, the bracket bearing upon the rear end of the sleeve. When sucha bracket is used, it is preferably formed with'a circular base 4| of a diameter such that. the base may be inserted or housed within the sleeve, the base thus presenting a shoulder adapted to bear against the inside face of the shoulder 3|. This arrangement will permit of the bracket being releasably locked to the sleeve, (when closed), when the puller is not in use, with a view to the safe carrying and storing away of all parts of the puller as a unit, V

A spacer 43 in the form of a disc 44 with rigid hollow rod 45 may be supplied with the device the spacer being pressedbetween the member 26 (or members 26 when a plurality is supplied with the device'as suggested in Figure 5) and the end of the screw 36 when the device is not in use and is to be carried and stored away as a unit, all as best suggested in Figure 5.

In Figure 6 is shown an insert or extension which may be used with my puller in certain cases. The insert is made of two similar semiments II and I2 when closed one against the other. One end of each segment is formed with a dependix wall forming a shoulder 52 and is also formed with a raised portion or shoulder 54. The shoulder 54 is adapted to engage the inside face of the wall or shoulder 24 of each of the segments H and I2, when closed. The shoulder 52 is adapted in turn to engage one face of the bearing or article to be removed from the shaft, while the end of the shaft is received into the aperture defined by the dependix walls 52. The insert will thus take the place of the articleengaging disc 26 in certain cases.

I claim:

1. In a 'puller of the kind described, the combination of two complementary semi-circular parts hinged together to form a sleeve when clos'edone against the other, each of said parts having a shoulder extending inwardly of said parts, a disc adapted to engage said shoulders when said parts are closed one against the other, said disc having a slot, means 'for releasably locking said parts closed one against the other, a circular nutv adapted'to be releasably locked relatively to said parts when closed one against the other, a screw threaded in said nut for move- .ment axially thereof, and a spacer'adapted to be pressed between said screw and said disc to hold said disc in said sleeve whereby the p'uller complete may be conveniently carried and stored away as a unit when not in use.

2. In a puller of the kind described, the comfor movement axially thereof, a bracket thread:

ed on said screw forming a support for said screw .at a point remote from said parts, saidbracket having an enlarged base portion adapted to engage the inside faces of the shoulders on the other end of said parts when closed one against the other to releasably hold said bracket. locked to said parts, and a spacer adapted to be pressed between said screw and said disc to hold said disc in said sleeve whereby the puller complete may be conveniently carried and stored away as a unit when not in use. g

J WILBURN MARCELLUS. 

